Contaminant hydrogeology of toxic organic chemicals at a disposal site, Gloucester, Ontario. 2. Remedial investigation

The leading edge of the plume, characterized by high concentrations of chloride and aliphatic ethers, e.g., 1,4-dioxane, has moved off site. Most of the halogenated hydrocarbons however remain directly below the disposal site in the outwash aquifer and the overlying aquitard. Here there is considerable evidence of dehalogenation reactions, which are probably microbially catalyzed. Field and laboratory experiments were undertaken to determine …